[Pkg-virtualbox-devel] Bug#441634: virtualbox-ose: Not backwards compatible with previous version

[Frans Pop]

Package: virtualbox-ose
Version: 1.5.0-dfsg2-1

After upgrading from 1.4.0svn4130-dfsg-1 the one VM I had been using to play
around with failed to start. It complained about a variable being missing
from the VM config file.

This was easy to fix by deleting the old VM and creating a new one
(virtualbox luckily does not keep that much important data with the machine;
except for snapshots of course).

I later compared the old and new config files (old was still on disk), and
it looks like the culprit was the "hostMode" field for Uart/Port (I'm not
100% sure the error was about hostMode, but it looked familiar; it should
be possible to reproduce):
       <Uart>
-        <Port IOBase="1016" IRQ="4" enabled="false" server="true" slot="0"/>
-        <Port IOBase="1016" IRQ="4" enabled="false" server="true" slot="1"/>
+        <Port IOBase="0x3f8" IRQ="4" enabled="false" hostMode="Disconnected" slot="0"/>
+        <Port IOBase="0x3f8" IRQ="4" enabled="false" hostMode="Disconnected" slot="1"/>
       </Uart>

Upstream should really make sure that new versions are at least backwards
compatible and do necessary conversions on upgrade.

Cheers,
FJP
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